Flow Properties of Stable Slurries : (1st Report, Experiment)

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On the flow properties of stable slurries of several polymer particles, experiments were carried out, using a Couette-type rotational viscometer and two capillary viscometers, in the range of concentration : 0〜45 (%) and rate of shear : 5〜7×10^3 (sec^<-1>), changing the size of particles, the viscosity of suspending liquids and the temperature. The results obtained are as follows. (1) The flow properties of slurries are not independent of the kind of viscometer (rotational or capillary) and the apparent viscosity by the capillary viscometer is lower than one by the rotational viscometer, at the same rate of shear. (2) P.M.M.A.-slurry is a Newtonian fluid in the range of concentration from 0 to 20 (%). But, P.E.-and P.V.C.-slurries become non-Newtonian fluids at lower concentrations. (3) Oliver's constant of P.M.M.A.-slurry is 2.60 and its value agrees with the results of experiments by others.
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